We want to distribute a non-AppStore-app to our users over MDM (our users happen to be consumers rather than employees). As our users will have enrolled in our MDM service, their devices will already have established a trust relationship with us, so our app will already be trusted. Our app is not coming from the store, so it will not have been reviewed by Apple. A contact of mine told me that if a device has a non-AppStore-app installed, Apple may consider that device’s warranty to be void, and may refuse to repair it under warranty. It seems unlikely to me that that would be the case for enterprise apps delivered over MDM, but I would like to be sure. Can anyone verify that the Apple device warranty will still be valid when the device has a non-AppStore enterprise app delivered over MDM installed on it?
iOS Enterprise App not from AppStore – any warranty issues?
Distribution to 'users' via Enterprise is a misuse of that program, which is for employees and agents only, so you're already in violation. How that would affect warranty and support is up to Apple.